Oxyacetylene blowpipe



1. wAss ANDR. s. MACGREGOR.

' OXYACETYLENE BLOWPIPE.

APPLICATIONl FILED MAY 23. 1921. 1,409,433. y

Patented Mar. 14, 1922.

2 SHEETS-SHEET l.

J. wAss AND R. s. MACGREGOR'.

-OXYACETYLENE BLOWPIPE.

APPLICATION FILED MAY 23, 192|.

1,409,433, mma Mar. 14,1922.

2 SHEETS-SHEET 2.

M@ @@/Jmmw Urrea surges Frio JOSEPH WA-SS AND ROY SUMNER IVIAcGfIEtEGr0R, OF NWHAYE, ENGLAND'.

QXYACETYLENE BLOWPIPE.

Specification of Letters Patent. Patented Dial'. 14, 1922.

l Application filed May 23, 192i. Serial No. 471,961.

To all whom it may concern.

Be it known that we, JOSEPH WAss and ROY SUMNER MAoGnEcon, both subjects of the King ofGreat Britain and Ireland, residing at The Clyde Marine and Motor Engineering Works, Newhaven, in the county is a specification.

The presentinvention relates to improvements in Oxy-acetylene blow pipes for use in the autogeneous cutting of metal under water of the type furnished with means for enabling the flame to be enveloped with a mantle of compressed air for the purpose of' 'displacing the water immediately surrounding the fiame so that said flame may act freely on the metal it is desired to cut.

In the burners heretofore devised for the cutting of metal under water the compressed air has been admitted to a ring or chamber surrounding the nozzle of the burner through an aperture located in the side wall of said ring or chamber and allowed to issue from a series of apertures provided in the ring or from an annular passage formed around the nozzle, the arrangement in either case being such -that the air issues in a mantle co-axial to and approximately parallel with the flame.

From experience it has been found necessary to so arrange the parts that the com- 'pressed air issues from the nozzle .ofthe chamber surrounding the nozzle of the blow pipe with greater force at a point below said 'nozzle and at 'an angle to the axis of the iiame, and it is the object of this invention -to provide a blow pipe with means for en-l abling this result to be attained.

As in the known devices, the chamber to which com ressed air is delivered, is according to this invention adapted to surround the nozzle of the blow pipe, but in the present case the chamber hasa much lar er area at the back end where the compresse air enters than it hasat the nozzle or exit end and in addition the interior surface and the orifice of said chamber are so formed that the air is directed to the bottom of the chamber and issues from said orificewith a cycloni'clor spiral eect.

The device forming the subject of this invention-is used in combination with a metal blow pipe of 'an suitable construction, having a nozzlea apted to be supplied with oxygen and acetylene gas through independent pipes .connected to the respective gas holders. pipe and arranged so as to'completely surround the nozzle is a chamber suitably connected with a supply of air or the like under pressure, a suitable non-return valve being located between the chamber and the source of supply. The chamber is provided on its .interior with a plurality of spirally arranged vanes or ribs `forming by and between them a series of grooves or channels the outer ends of which terminate at or near the nozzle. The outer face of the chamber, in pro rimity to the nozzle, may be formed concave or cup shaped for'th'e purpose of producing, in conjunction with the spiral grooves or channels within the chamber, a cyclonic effect as the air or the like under pressure issues from the nozzle of., the chamber.

In the accompanying drawing which illustrates a -formof construction of'this invention Figure l is a side elevation. l

Figure 2 is a sectional elevation showing the device forming the subject of this invention, applied to an Oxy-acetylene blow pipe, in the position in which it should be held .when in use. l Figure 3 is a section on line .a2- Figure 2, looking towards the nozzle end of the attachment.

Figure 4 is an end view of the outer face of the base of the attachment.

Figure 5 is an end view of the inner face ofthe base with the chamber removed and part of the adjusting ring cut away.

lThe device comprises, according. to the construction illustrated a chamber 1, an adjustable nose 2 an adjusting ring 3 and a fixed base 4 furnished with a union nut 5 by -means of which the attachment is rmly secured to the nozzle 6 of the blow pipe. The parts 1 and 4 are so arranged that they may Ibe adjusted in an axial d1-rect1on with relation to each other but so that they have no inde endent rotary movement.

The c amb'er'l,` is provided with a base 7 furnished with a port 8, and the interior wall is provided withV a series of vanes or ribs, forming by and between them a series Suitably connected to the blow of channels or grooves. There are two oppositely disposed'main vanes 9 which extend from the base 7 of the chamber to the nozzle. aperture 10, and two shorter vanes 11 which extend approximately from the middle of the chamber to the aperture 10, the outer face of each vane towards the nozzle end of the chamber is arranged to projectv towards the axis of the chamber so that it will lie in close proximity to the face of the nozzle when the chamber is attached to vthe blow pipe.

The vanes are so disposed that that part of thevwall running from the aperture 8 to the nozzle aperture 10 is unobstructed, thereby leaving a clear passage for the compressed air as it issues through the port 8 from the chamber 12 formed between the base 4 and the base `7 yof the chamber l, and the air that finds its way into the upper part of the chamber is directed downwardly by .the vanes `and is caused to pass through the channels between said vanes to theaperture 10 in a spiral-direction, the main volume of air at the highest pressure being caused to issue from the nozzle l() below the nozzle 6 of the blow pipe.

If'it is desired to vary the volume and the pressure of the air issuing from the nozzle 10, the lock nut 13 is slackened and the adjustingy ring 3 is turned so as to cause the chamber 1 to move axially towards or away from the fixed base depending'on whether it is desired to reduce the volume and consequently increase the pressure, or, to increase the volume and decrease the pressure. Rotary movement of the chamber 1 is prevented by the projections 14 on the base o the part 1 engaging with the grooves 15 formed in the central boss 16 on the fixed base 4. When the 'desired change has been effected, the lock nut is tightened up.

If it is desired Ito increase or decrease the distance between the face of the plate being operated on and the end of the nozzle 6 the part 2 ismoved axially by a rotative movement on the part 1.

When the device is to be used with a blow pipe of the type illustrated in dotted lines in Figure 2, the nozzle 6 of said blow pipe is firstremoved by unscrewing the union nut 17, the union nut l5 is then slipped on and the union nut 17 and nozzle replaced. A washer 18 is slipped o ver the nozzle 6 and the base 4 carrying the adjusting ring 3 is secured in position by the union nut 5 an air tight joint being thereby secured between the nozzle 6 and base 4. The charnber 1 is then placed in position on the boss 16 and the adjusting ring 3 is turned to engage the screw thread at the base of the chamber 1 which is adjusted to the desired position and locked therein,a washer 19 being preferably interposed between the adjusting ring 3 and lock nut 13 to secure an air tight joint between the chamber 1 and 'ring 3.

The adjusting ring 3 is provided with an l -shown by dotted lines in Fig. 2 if desired be castellated, that is, formed with a series of recesses or cut awayportions so as to produce aseries of projections around the outer edge, or if desired an additional part may be attached to Ysaid part in any desired manner.

While the main controls for regulating the y supply of. acetylene and oxygen are preferably disposed near to the supply, that is,

above water, the blow pipe is preferably provided with additional controls so that the operator may regulate the flame and also the'supply of compressed air as desired.

What we claim is 1. A device for use in combination with an Oxy-acetylene blow pipe comprising a chamber adapted to surround the nozzle of said, blow pipe and terminating in a nozzle concentrically arranged in relaation to the nozzle of the blow pipe, a port in said cham-- ber for the introduction of compressed air and means comprising l-a series ot vanes located on the inner wall of said chamber for directing the flow of the compressed air and causing the main volume of air at the highest pressure to issue at the nozzle of said chamber at a point below the nozzle of the blow pipe.

2. A device for use in combination with an Oxy-acetylene blow pipe comprising a chamber adapted to surround the nozzle of said blow pipe and terminating in a nozzle 'concentrically arranged in relation to the nozzle of the blow pipe, a port located at the lowest point in the base of said chamber for the introduction of compressed air and means comprising a series of vanes located on the inner wall of said chamber for directing the flow of the compressed air Aand causing the main volume of air at the hi hest pressure to issue at the nozzle of said c amber at a point below the nozzle of the blow 1 e. p A device for use in combination with an Oxy-acetylene' blow pipe comprising a chamber adapted to surround the nozzle of said blow pipe, and terminating in a nozzle concentrically arranged in-relation to the nozzle of the blowpipe, a port in said chamber for the introduction of compressed air and means comprising a seriesV of vanes located on the inner wall of said chamber for directing the flow of the compressed air and causing the main volume of air at the highest pressure to issue at the nozzle of'l saidchamber at a point immediately below the nozzle of the blow pipe.

4. A device for use in combination with an Oxy-acetylene blow pipe comprising a chamber adapted to surround the nozzle of said blow pipe and terminating at one end in a nozzle concentrically arranged in relation to the nozzle of the blow pipe, and -at the other with a --base having a concentrically disposed aperture, means fixed to said blow plpe for supporting said chamfixed lpart and at its other to the compressedl air supply, a port in said chamber for the introduction of compressed air to said chamber, means located on the inner wall of said chamber for directing the flow of compressed air and causing themain volume of air at the Ahighest pressure to issue at the nozzle of' said chamber at a point immediately belowthe nozzle of the blow pipe and means adjustably mounted on the outer end of said chamber vby which the distance between the part being operated on and the outer end of the nozzle may be varied. I

5. A device for use in combination with an Oxy-acetylene blow pipe comprising a chamber adapted to surroundv the nozzle of said blow pipe and terminating ina nozzle concentrically arranged in relation 'to the nozzle of the blow pipe, means by which said chamber may be adjusted axially relatively 'to said nozzle, meansffor maintaining an air tight joint between said parts, a port in said chamber for the introduction of compressed -air to saidchamber, means located within said chamber for -directing the flow of compressed air and causing the main volume of air at the highest pressure to issue at the nozzle of said chamber ata .point immediately below the nozzle of the blow pipe, and means adjustably mounted on the outer end .of said chamber by which the distance between the part being-operated on and the outerend of the nozzle may be varied.

6. A device for use `in combination with an Oxy-acetylene blow pipe comprising a directing the flow of compressed air and j causing the main volume of'air-at the highest pressure to issue from the nozzle of the chamber at a point immediately below the nozzle of the blow pipe.

7. A device for use in combination with an Oxy-acetylene blow pipe comprising achamber adapted to surround the nozzle of said blow pipel and terminating in 'a nozzle i concentrically arranged in relation to the nozzle of the blow pipe, means fixed to said blow pipe for supportingsaid chamber, means interposed between the chamber and said fixed means by.v which said chamber may be adjusted axially relatively to said fixed means and said nozzle, means for supplying compressed air to said chamber anda series of v-anes located on the inner wall of said chamber so arranged as to direct the flow of the compressed air as to cause the main volume of air at the highest pressure to issue from the nozzle of the chamber at a point immediately below vthe nozzle of the `blow pipe.

8. A device for use in combination with an Oxy-acetylene blow pipe comprising a chamber concentrically arranged 'with relation to and adapted to surround the nozzle of said blow pipe, means fixed to said blow pipejor supporting said chamber, means for maintaining an air tight joint between said nozzle andfixed part, means interposed betweenthe chamber' and said fixed means by which said chamber may be -adjustedy 9. A device for. use in combination rwith` an Oxy-acetylene blow pipe comprising a chamber concentically'a'rranged with relation lto and adapted to surround-the nozzle of said blow pipe, means 'fixed to said blow pipe for supporting said chamber, means interposed between the -chamber and said fixed means by which said chamber ma be adjusted axially relatively to 'said xed..

means and said nozzle, means for maintaining an air tight joint between said parts, a port in said chamber for the introduction of compressed air to said chamber, av plurality of spirally arranged vanes located on the lnner wall of said chamber formlng by and between them a series of channels in whichl the main volume of compressed air at the highest pressurel is caused to issue fram the nozzle of the chamber at a point inmediately below the point 'of the nozzle of the blow pipe, means adjustably mounted on the outer end of said chamber by which the distance between thef part being operated on and the outer endl of the nozzle maybe varied.

10. A device for use in combination with an oxy-acetylene blow pipe comprising a chamber Vconcentrically arranged with relation to and adapted Ato surround the nozzle of said blow pipe, means fixed to said blow pipe for supporting said chamber, means for maintaining` an air tight jointbetween said nozzle and fixed part, means interposed between .the chamber and said fixed means by which said chamber may be adjusted axially relatively to said fixed means and saidnozzle, means for maintaining an air tight joint between said parts, means for supplying comressed air to said chamber and means ocated on the inner wall of said chamber for directing the flow of compressed air .and causing the mai-n volume of air at the hi hest pressure to issue from the nozzle o the chamber'at a point immediately below the -nozzle of the blow pipe, means adjustably mounted on the outer end of said chamber by which the vdistance between the part being operated on and the outer end of the nozzle may be varied.

11. A device for use 1n combinationwith` an 'Oxy-acetylene blow pipe comprising a chamber adapted to surround the nozzle of a4 blow pipe and terminating in a nozzle concentrically arranged in relation to the nozzle of the blow pipe, means fixed to said blow pipe for supporting said chamber,

means interposed between the chamber and' said 'fixed means by which said chamber may beadjustedl ,axially relatively to said fixed means and said lnozzle, means forl maintaining an air tight joint between said parts, a port in said chamber for the introduction of compressed air to said chamber, means located Within said chamber for directing -the How ofcompressed air and causing the mam volume of a1r at the hlghest pressure to issue from the nozzle of the -`chamber at a point immediately below the 

